>>26575170After the credits, we see Serena at the top of Prism Tower, standing on the edge.
Camera pans on her eyes, tears stream down her cheeks. She then jumps with a sad smile on her face.
Cut to the entrance of the tower, where Ash, Luna, Clemont and Bonnie talk before parting their ways.
Just as Ash and Luna are about to leave, Serena's head hits the pavement.
Basically, think of Kotonoha's suicide in School Days.